CN105050844A - Hybrid vehicle - Google Patents

Hybrid vehicle Download PDF

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Publication number
CN105050844A
CN105050844A CN201480017069.3A CN201480017069A CN105050844A CN 105050844 A CN105050844 A CN 105050844A CN 201480017069 A CN201480017069 A CN 201480017069A CN 105050844 A CN105050844 A CN 105050844A
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CN
China
Prior art keywords
speed
oil pump
type oil
speed ratio
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201480017069.3A
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Chinese (zh)
Other versions
CN105050844B (en
Inventor
长岭守洋
高野亮
大塩伸太郎
平野拓朗
儿玉仁寿
山本明弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
JATCO Ltd
Original Assignee
Nissan Motor Co Ltd
JATCO Ltd
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Publication date
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Publication of CN105050844A publication Critical patent/CN105050844A/en
Application granted granted Critical
Publication of CN105050844B publication Critical patent/CN105050844B/en
Active legal-status Critical Current
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
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    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
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    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/14—Dynamic electric regenerative braking for vehicles propelled by ac motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/101—Infinitely variable gearings
    • B60W10/107—Infinitely variable gearings with endless flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
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    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
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    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/945—Characterized by control of gearing, e.g. control of transmission ratio

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  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
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Abstract

A hybrid vehicle according to the present invention is provided with a mechanical oil pump driven by an engine, and an electric oil pump driven by an electric motor. When the vehicle travels in an electric travel mode in which the engine is stopped and the travel is enabled by driving force from a drive motor, the electric oil pump is activated.

Description

Motor vehicle driven by mixed power
Technical field
The present invention relates to a kind of motor vehicle driven by mixed power, it is equipped with driving engine and electrical motor as propulsion source, can select the electric running pattern (EV pattern) travelled by means of only electrical motor and mixing power fortune driving mode (HEV mode) travelled by electrical motor and driving engine.
Background technology
As this motor vehicle driven by mixed power, such as, it is known that motor vehicle driven by mixed power described in patent documentation 1.With regard to this motor vehicle driven by mixed power, driving engine is combined with drive wheel separably via toric transmission and power-transfer clutch successively, and electrical motor is combined with drive wheel usually.In addition, possesses mechanical type oil pump driven by the engine, to toric transmission or clutch feed.
This motor vehicle driven by mixed power is by making engine stop, and above-mentioned power-transfer clutch is discharged, the electric running (EV traveling) of the EV pattern that only electrical motor realizes can be carried out, by making engine starting, and connected by this power-transfer clutch, the mixing power that can carry out the HEV mode of electrical motor and driving engine realization runs to be sailed (HEV traveling).
In addition, because discharged by power-transfer clutch in travelling at EV, driving engine or toric transmission are separated from drive wheel, so the friction of the driving engine that can reduce in EV traveling or toric transmission.
Prior art document
Patent documentation
Patent documentation 1:(Japan) JP 2000-199442 publication
Invent problem to be solved
But, in the above prior art, along with engine stop, mechanical type oil pump can be caused to stop.
When not supplying oil pressure, the careless speed change of the converter speed ratio of toric transmission (following, to describe as returning low speed) will be caused to low speed (Low) side.Return in the generation of low speed or after producing at this, whenever carrying out the switching from EV pattern to HEV mode, compared with not carrying out returning the situation of low speed, speed of a motor vehicle when being connected by power-transfer clutch is higher, and the toric transmission side rotating speed of power-transfer clutch when being connected by power-transfer clutch is higher lower than the possibility of the driven wheel side rotating speed of power-transfer clutch.When being connected by power-transfer clutch in this condition, driven wheel side rotating speed just declines along with the connection of power-transfer clutch, and chaufeur can feel that traction is impacted.
Summary of the invention
The present invention is conceived to above-mentioned problem, its object is to, and provides the motor vehicle driven by mixed power that stably can be switched to HEV mode traveling from EV pattern.
In order to realize this object, motor vehicle driven by mixed power of the present invention is driven by drive motor or regenerative brake drive wheel, when being discharged by the power-transfer clutch between drive wheel and toric transmission making engine stop, maintains the converter speed ratio of toric transmission.
Thus, when travelling with electric running pattern, even if mechanical type oil pump stops, also can suppress to return low speed by converter speed ratio holdout device, the traction come along with the connection of power-transfer clutch can be suppressed to impact.
Accompanying drawing explanation
Fig. 1 is the drive system of the motor vehicle driven by mixed power representing embodiment 1 and the outline system diagram of overall system control thereof;
Fig. 2 is in the motor vehicle driven by mixed power of embodiment 1, a () represents the drive system of this motor vehicle driven by mixed power and the outline system diagram of overall system control thereof, (b) is the connection schematic diagram of the power-transfer clutch in the demultiplicator being built in V-type variable v-belt drive of the drive system of this motor vehicle driven by mixed power;
Fig. 3 is the example being stored in the speed change figure of gearbox controller of embodiment 1;
Fig. 4 is the mode chart being set with driving mode of the motor vehicle driven by mixed power of embodiment 1;
Fig. 5 is the counteractive skeleton diagram of effect of the power of the speed-changing mechanism representing embodiment 1;
Fig. 6 is the characteristic map of the relation of the counteractive relation of effect of the power of the speed-changing mechanism representing Fig. 5 and the oil pressure required for converter speed ratio maintenance;
Fig. 7 is the diagram of circuit of the converter speed ratio maintenance control treatment of the EV pattern representing embodiment 1;
Fig. 8 is the detailed time diagram that the converter speed ratio represented in the mode transition of embodiment 1 maintains;
Fig. 9 is time diagram when not producing oil pressure when EV pattern in the motor vehicle driven by mixed power of comparative example;
Figure 10 is time diagram when making electrodynamic type oil pump EO/P work and produce oil pressure in the motor vehicle driven by mixed power of embodiment 1 when EV pattern;
Figure 11 has carried out comprising vehicle to stop at interior converter speed ratio and maintain time diagram when controlling;
Figure 12 is the diagram of circuit of the electrodynamic type operation of oil pump process representing embodiment 1;
Figure 13 is the time diagram of the electrodynamic type operation of oil pump process representing embodiment 1;
Figure 14 represents that the electrodynamic type oil pump of embodiment 1 stops the diagram of circuit of process;
Figure 15 represents that the electrodynamic type oil pump of embodiment 1 stops the time diagram of process;
Figure 16 is the diagram of circuit of the electrodynamic type operation of oil pump process representing embodiment 2;
Figure 17 is the time diagram of the electrodynamic type operation of oil pump process representing embodiment 2;
Figure 18 represents that the electrodynamic type oil pump of embodiment 3 stops the diagram of circuit of process;
Figure 19 represents that the electrodynamic type oil pump of embodiment 3 stops the time diagram of process;
Figure 20 be represent embodiment 4 speed-changing mechanism and carry out oil pressure cntrol magnet coil outline figure;
Figure 21 be represent embodiment 5 speed-changing mechanism and carry out oil pressure cntrol magnet coil outline figure;
Figure 22 be the speed-changing mechanism representing embodiment 6 outline figure.
Nomenclature
1 driving engine (propulsion source)
2 electrical motors (propulsion source)
3 self-starting motors
4V type variable v-belt drive
5 drive wheels
6 primary pulley
7 secondary pulley
8V type band
CVT speed-changing mechanism (stepless speed changing mechanism)
T/C turbine transformer
9,11 terminal teeth wheels
12 storage batterys
13 inverters
14 brake discs
15 brake clamps
16 brake pedals
17 suction type brake servo units
18 main hydraulic cylinders
19 accelerator pedals
21 hybrid controllers
22 engine controllers
23 motor controllers
24 gearbox controllers
25 battery controllers
26 brake switches
27 accelerator pedal jaw opening sensors
O/P oil pump
31 demultiplicators
CL power-transfer clutch
H/C high-speed clutch
R/B reverse gear brake
L/B low brake
32 car speed sensors
Detailed description of the invention
(embodiment 1)
Fig. 1 is the drive system of the motor vehicle driven by mixed power representing embodiment 1 and the outline system diagram of overall system control thereof.The motor vehicle driven by mixed power of Fig. 1 is equipped with driving engine 1 and electrical motor 2 as propulsion source, and driving engine 1 is started by self-starting motor 3.Driving engine 1 suitably can carry out driving via V-type variable v-belt drive 4 and drive wheel 5 and combine with cutting off.
The speed-changing mechanism CVT of toric transmission 4 is by primary pulley 6, secondary pulley 7, is wrapping with the V-type band type stepless speed changing mechanism that the V-type band 8 (annular flexible parts) between these two belt wheels 6,7 forms.In addition, what V-type band 8 adopted is the structure being retrained multiple element by endless belt, but can be also chain mode etc., is not particularly limited.Primary pulley 6 is combined with the bent axle of driving engine 1 via turbine transformer T/C, and secondary pulley 7 is combined with drive wheel 5 via power-transfer clutch CL and terminal teeth wheels 9 successively.In addition, in the present embodiment, the element (power-transfer clutch or drg etc.) disconnecting, connect power transfer path is referred to as power-transfer clutch.Fig. 1 is the figure schematically showing power transfer path, and the high-speed clutch H/C be arranged in demultiplicator 31 described later, reverse gear brake R/B and low brake L/B are referred to as power-transfer clutch CL.When power-transfer clutch CL is coupled situation, power from driving engine 1 inputs to primary pulley 6 through turbine transformer T/C, thereafter, drive wheel 5 is delivered to, for the traveling of motor vehicle driven by mixed power through V-type band 8, secondary pulley 7, power-transfer clutch CL and terminal teeth wheels 9 successively.
In engine power transmits, wide by the wide belt wheel V-shaped groove strengthening secondary pulley 7 of the belt wheel V-shaped groove that reduces primary pulley 6, that strengthens V-type band 8 and primary pulley 6 is wrapping with arc diameter, reduction simultaneously and secondary pulley 7 be wrapping with arc diameter.Thus, speed-changing mechanism CVT carries out the upshift to high speed (High) side belt wheel ratio (high-speed side converter speed ratio).When the upshift to high-speed side converter speed ratio has been proceeded to the limit, converter speed ratio has been set as most transmission ratio.
Otherwise wide by the wide belt wheel V-shaped groove reducing secondary pulley 7 of the belt wheel V-shaped groove that strengthens primary pulley 6, what reduce V-type band 8 and primary pulley 6 is wrapping with arc diameter, strengthen simultaneously with secondary pulley 7 be wrapping with arc diameter.Thus, speed-changing mechanism CVT carries out the downshift to low speed (Low) side belt wheel ratio (low speed side converter speed ratio).When the downshift to low speed side converter speed ratio has been proceeded to the limit, converter speed ratio has been set as lowest transmission ratio.
Speed-changing mechanism CVT has the secondary tachogen 7a of the elementary tachogen 6a of the rotating speed of detection of primary belt wheel 6 and the rotating speed of detection secondary pulley 7, based on the rotating speed detected by this two tachogens, calculate actual converter speed ratio, the mode becoming target change gear ratio with this actual converter speed ratio carries out the oil pressure cntrol etc. of each belt wheel.
Electrical motor 2 is combined with drive wheel 5 via terminal teeth wheels 11 usually, and this electrical motor 2, by the electric power of storage battery 12, is driven via inverter 13.
The direct current power of storage battery 12 is transformed into alternating electromotive force and supplies to electrical motor 2 by inverter 13, and by the supply electric power of plus-minus to electrical motor 2, carries out propulsive effort control and hand of rotation control to electrical motor 2.
In addition, electrical motor 2, except above-mentioned direct motor drive, also plays function, also for regenerative brake as electrical generator.When this regenerative brake, inverter 13, by applying the corresponding generation load of regenerative braking force to electrical motor 2, makes electrical motor 2 play a role as electrical generator, the generation power of electrical motor 2 is stored in storage battery 12.
The motor vehicle driven by mixed power of embodiment 1 is by discharging power-transfer clutch CL and being driven by electrical motor 2 under the state making driving engine 1 stop or regenerating, only the power of electrical motor 2 is delivered to drive wheel 5 through terminal teeth wheels 11, travels with the electric running pattern (EV pattern) that only electrical motor 2 realizes.During this, by being discharged by power-transfer clutch CL, reduce the driving engine 1 of halted state and the friction of speed-changing mechanism CVT, the useless power consumption in suppressing EV to travel.
Under the motoring condition of above-mentioned EV pattern, when driving engine 1 being started when utilizing self-starting motor 3 and power-transfer clutch CL is connected, power from driving engine 1 is just delivered to drive wheel 5 through turbine transformer T/C, primary pulley 6, V-type band 8, secondary pulley 7, power-transfer clutch CL and terminal teeth wheels 9 successively, and mixing power fortune driving mode (HEV mode) that motor vehicle driven by mixed power realizes with driving engine 1 and electrical motor 2 travels.
When making motor vehicle driven by mixed power stop from above-mentioned motoring condition or remain on this dead ship condition, by utilizing brake clamp 15 brake disc 14 rotated together with drive wheel 5 being clamped and carrying out braking and realize object.Under the power-assisted that the suction type brake servo unit 17 of the legpower of the brake pedal 16 that brake clamp 15 depresses with chaufeur in response realizes, the main hydraulic cylinder 18 of the brake fluid pressure corresponding to output brake-pedal depression force connects.By the brake fluid pressure produced by main hydraulic cylinder 18, brake clamp 15 is worked, carries out the braking of brake disc 14.Under motor vehicle driven by mixed power any one pattern in EV pattern and HEV mode, all depress with chaufeur the corresponding torque actuated wheel 5 of propulsive effort instruction that accelerator pedal 19 carries out instruction, travel with the corresponding propulsive effort of the request of chaufeur.
Hybrid controller 21 performs: the driving mode of motor vehicle driven by mixed power is selected, the output control of driving engine 1, electrical motor 2 hand of rotation control and export the charge and discharge control of control, the connection of the variable speed control of speed-changing mechanism CVT, the variable speed control of demultiplicator 31 and power-transfer clutch CL, release control and storage battery 12.Now, hybrid controller 21 carries out these control via corresponding engine controller 22, motor controller 23, gearbox controller 24 and battery controller 25.
Input to hybrid controller 21: from the signal of accelerator pedal jaw opening sensor 27 disconnecting (OFF) and switch to the normal open switch of connection (ON) and the signal of brake switch 26 and carry out the Autonomous test accelerator pedal amount of depressing (accelerator pedal aperture) APO when freely depressing the braking of brake pedal 16.Hybrid controller 21 also, between engine controller 22, motor controller 23, gearbox controller 24 and battery controller 25, carries out the access of internal information.
Engine controller 22 responds the instruction from hybrid controller 21, carry out output to driving engine 1 to control, motor controller 23 responds the instruction from hybrid controller 21, and the hand of rotation carrying out electrical motor 2 via inverter 13 controls and export to control.Gearbox controller 24 responds the instruction from hybrid controller 21, with from by the oil of engine-driven mechanical type oil pump O/P (or by electrodynamic type oil pump EO/P that pump motor drives) for medium, carry out the connection of the variable speed control of speed-changing mechanism CVT (V-type band type stepless speed changing mechanism CVT) and the variable speed control of demultiplicator 31 and power-transfer clutch CL, release control.Battery controller 25 responds the instruction from hybrid controller 21, carries out the charge and discharge control of storage battery 12.
Fig. 2 (a) is the drive system of the motor vehicle driven by mixed power representing embodiment 1 and the outline system diagram of overall system control thereof, Fig. 2 (b) is the connection schematic diagram of the power-transfer clutch CL (specifically, H/C, R/B, L/B) in the demultiplicator 31 being built in toric transmission 4 of the drive system of the motor vehicle driven by mixed power of embodiment 1.Shown in Fig. 2 (a), demultiplicator 31 is made up of cured civilian brain formula compound planet gear, and this cured civilian brain formula compound planet gear is made up of composite solar gear 31s-1 and 31s-2, internal pinionmw 31pin, outer miniature gears 31pout, gear ring 31r, rotatably the planetary gear carrier 31c of supporting miniature gears 31pin, 31pout.
In composite solar gear 31s-1 and 31s-2, sun gear 31s-1 is combined in the mode played a role as input rotating member with secondary pulley 7, and sun gear 31s-2 relative to secondary pulley 7 arranged coaxial, but can rotate freely.
Internal pinionmw 31pin is engaged with sun gear 31s-1, and this internal pinionmw 31pin and sun gear 31s-2 is engaged with outer miniature gears 31pout respectively.
Outer miniature gears 31pout engages with the inner circumferential of gear ring 31r, is combined by planetary gear carrier 31c in the mode played a role as output rotating member with terminal teeth wheels 9.
Power-transfer clutch CL and high-speed clutch H/C can be utilized suitably to be combined by planetary gear carrier 31c and gear ring 31r, power-transfer clutch CL and reverse gear brake R/B can be utilized suitably to be fixed by gear ring 31r, power-transfer clutch CL and low brake L/B can be utilized suitably to be fixed by sun gear 31s-2.
Demultiplicator 31 connects with the combination shown in zero of Fig. 2 (b) mark by making high-speed clutch H/C, reverse gear brake R/B and low brake L/B, make in addition they as Fig. 2 (b) × mark shown in release, can select advance first speed, second speed, retreat speed change level.When high-speed clutch H/C, reverse gear brake R/B and low brake L/B are all discharged, demultiplicator 31 becomes the neutral condition of not carrying out transmission of power, when in this condition low brake L/B being connected, demultiplicator 31 just becomes selects advance first speed (deceleration) state, when high-speed clutch H/C is connected, demultiplicator 31 just becomes the state selecting advance second speed (directly connecting), when being connected by reverse gear brake R/B, demultiplicator 31 just becomes to be selected to retreat (reversion) state.
The toric transmission 4 of Fig. 2 (a), by demultiplicator 31 is set to neutral condition by whole power-transfer clutch CL (H/C, R/B, L/B) release, can cut off between speed-changing mechanism CVT (secondary pulley 7) and drive wheel 5.
The toric transmission 4 of Fig. 2 (a) be with from by engine-driven mechanical type oil pump O/P or the oil of electrodynamic type oil pump EO/P that driven by pump motor for working medium carries out the toric transmission that controls, gearbox controller 24, via pipeline piezoelectricity magnetic coil 35, locking magnet coil 36, primary pulley piezoelectricity magnetic coil 37-1, secondary pulley piezoelectricity magnetic coil 37-2, low brake piezoelectricity magnetic coil 38, high-speed clutch pressure & reverse gear brake piezoelectricity magnetic coil 39 and switch valve 41, controls this control of speed-changing mechanism CVT as follows.In addition, input based on except the signal described in Fig. 1 except to gearbox controller 24, also input the signal from the signal of the car speed sensor 32 detecting speed of a motor vehicle VSP and the acceleration pick-up 33 from detection vehicle acceleration-deceleration G.
Pipeline piezoelectricity magnetic coil 35 responds the instruction from gearbox controller 24, the oil from mechanical type oil pump O/P is adjusted to the pipeline pressure PL that vehicle request propulsive effort is corresponding.In addition, be connected with electrodynamic type oil pump EO/P, respond the instruction from gearbox controller 24 between mechanical type oil pump O/P and pipeline piezoelectricity magnetic coil 35, charge pump discharges pressure.
Locking magnet coil 36 responds the locking instruction from gearbox controller 24, by being pressed by pipeline PL suitably to lead turbine transformer T/C, and as required turbine transformer T/C is set to the lockup state directly connecting input and output interelement.
Primary pulley piezoelectricity magnetic coil 37-1 responds the CVT converter speed ratio instruction from gearbox controller 24, be adjusted to primary pulley pressure by pipeline being pressed PL and this pressure is supplied to primary pulley 6, the V-shaped groove controlling primary pulley 6 in the mode that CVT converter speed ratio is consistent with the instruction from gearbox controller 24 is wide wide with V-shaped groove that is secondary pulley 7, realizes the CVT converter speed ratio instruction from gearbox controller 24.
Secondary pulley piezoelectricity magnetic coil 37-2 responds the Clamping force instruction from gearbox controller 24, and by being pressed by pipeline PL be adjusted to secondary pulley pressure and this pressure is supplied to secondary pulley 7, V-type band 8 clamps to make it non-slip by secondary pulley 7.
Low brake piezoelectricity magnetic coil 38 is when gearbox controller 24 sends the first fast selection instruction of demultiplicator 31, low brake L/B is supplied to as low brake pressure by pipeline being pressed PL, this low brake L/B is connected, realizes the first fast selection instruction.
Pipeline, when gearbox controller 24 sends the second fast selection instruction of demultiplicator 31 or retreats selection instruction, presses PL to be supplied to switch valve 41 as high-speed clutch pressure & reverse gear brake pressure by high-speed clutch pressure & reverse gear brake piezoelectricity magnetic coil 39.
The maximum discharge ability of the electrodynamic type oil pump EO/P of embodiment 1 is set as less than mechanical type oil pump O/P, not there is the discharge ability of the degree making speed-changing mechanism CVT speed change, by the discharge ability of degree of the discharge ability or supply lubricating oil of guaranteeing the degree maintaining converter speed ratio, realize the electrical motor of electrodynamic type oil pump EO/P and the miniaturization of pump.
When the second fast selection instruction, by switch valve 41, the pipeline pressure PL from magnet coil 39 is pressed guiding high-speed clutch H/C as high-speed clutch, and this high-speed clutch H/C is connected, realize the second fast selection instruction of demultiplicator 31.
When retreating selection instruction, by switch valve 41, the pipeline pressure PL from magnet coil 39 being pressed guiding reverse gear brake R/B as reverse gear brake, and this reverse gear brake R/B is connected, realizing the retrogressing selection instruction of demultiplicator 31.
(about variable speed control process)
Then, variable speed control process is described.Fig. 3 is the example being stored in the speed change figure of gearbox controller 24 of embodiment 1.Gearbox controller 24, with reference to this speed change figure, meanwhile, according to the driving condition (in embodiment 1, being vehicle velocity V SP, elementary rotative speed Npri, accelerator pedal aperture APO) of vehicle, controls toric transmission 4.In this speed change figure, the operation point of toric transmission 4 is defined by vehicle velocity V SP and elementary rotative speed Npri.Connect the operation point of toric transmission 4 and the gradient of the line at the zero point in the speed change figure lower left corner and the converter speed ratio (converter speed ratio of speed-changing mechanism CVT is multiplied by the converter speed ratio of the entirety of the converter speed ratio gained of demultiplicator 31, calls in the following text " through converter speed ratio ") of toric transmission 4 corresponding.
Same with the speed change figure of existing variable v-belt drive, this speed change figure is set with shift cable for each accelerator pedal aperture APO, and the speed change of toric transmission 4 is carried out according to the shift cable selected according to accelerator pedal aperture APO.In addition, for the sake of simplicity, illustrate only in figure 3 at full capacity line (shift cable during accelerator pedal aperture APO=8/8), half load line (shift cable during accelerator pedal aperture APO=4/8), slide line (shift cable during accelerator pedal aperture APO=0/8).
When toric transmission 4 is low-speed mode, the low-speed mode dead slow line that toric transmission 4 can obtain the converter speed ratio of speed-changing mechanism CVT is set to dead slow converter speed ratio and the converter speed ratio of speed-changing mechanism CVT be set to most higher speed gear ratio and carry out speed change between the most high-speed line of the low-speed mode obtained.Now, the operation point of toric transmission 4 is moved in a-quadrant and B region.On the other hand, when toric transmission 4 is fast mode, the fast mode dead slow line that toric transmission 4 can obtain the converter speed ratio of speed-changing mechanism CVT is set to dead slow converter speed ratio and the converter speed ratio of speed-changing mechanism CVT be set to most higher speed gear ratio and carry out speed change between the most high-speed line of the fast mode obtained.Now, the operation point of toric transmission 4 is moved in B region and C region.
The converter speed ratio (low-speed mode most higher speed gear ratio) that the converter speed ratio of each speed change level of demultiplicator 31 is set as corresponding to the most high-speed line of low-speed mode is less than the converter speed ratio (fast mode dead slow converter speed ratio) corresponding to fast mode dead slow line.Thus, the scope of the through converter speed ratio of the toric transmission 4 that low-speed mode is desirable is (in figure, " low-speed mode ratio coverage ") and the scope of through converter speed ratio of the desirable toric transmission 4 of fast mode (in figure, " fast mode ratio coverage ") part repetition, when being positioned at the B region clipped by fast mode dead slow line and the most high-speed line of low-speed mode in the operation point of toric transmission 4, toric transmission 4 also can select any one pattern in low-speed mode, fast mode.
In addition, on this speed change figure, the pattern of carrying out the speed change of demultiplicator 31 switches shift cable and is set as overlapping in the most high-speed line of low-speed mode.Switch the through converter speed ratio (calling in the following text " mode switch speed ratio mRatio ") of shift cable corresponding to pattern and be set as the value that higher speed gear ratio most with low-speed mode is equal.The reason that such set model switches shift cable is that the converter speed ratio of speed-changing mechanism CVT is less, and the input torque to demultiplicator 31 is less, can suppress gear shift shock when making demultiplicator 31 speed change.
And, when the operation point of toric transmission 4 pattern of having crossed switches shift cable, namely, when the actual value of through converter speed ratio stride across mode switch speed ratio mRatio to have carried out changing, gearbox controller 24 carries out coordination speed change with speed-changing mechanism CVT and demultiplicator 31 both sides, and carries out the switching between fast mode-low-speed mode.
(about pattern switching controls)
Fig. 4 is the mode chart being set with driving mode of the motor vehicle driven by mixed power of embodiment 1.In the mode chart of Fig. 4, more than 0 of the longitudinal axis sets according to accelerator pedal aperture, and less than 0 is set according to the on-off state of brake switch 26.At accelerator pedal 19 by the EV power operation area that depresses, be set with the power operation area of EV pattern until power operating speed VSPX.In addition, the detailed of this power operating speed VSPX is described below.In addition, representing accelerator pedal 19 almost by the state that depresses (not such as, the accelerator pedal aperture fully less than 1/8) region in, be set with the power operation area of EV pattern until the regulation vehicle velocity V SP1 of the speed of a motor vehicle higher than power operating speed VSPX.At accelerator pedal 19 by under the state that depresses, select the region of this below regulation vehicle velocity V SP1 hardly.
On the other hand, will speed up in the traveling of HEV mode device pedal 19 discharge and move to slide situation that (inertia) travel or from the power running state of HEV mode depress brake pedal 16 and by car brakeing, the kinetic energy of vehicle is transformed to electric power by the regenerative brake realized by utilizing electrical motor 2, and by this power storage in storage battery 12, realize the raising (HEV reproduced state) of efficiency.
; when carrying out regenerative brake (HEV reproduced state) under the state of HEV mode; because power-transfer clutch CL is coupled situation; the part of anti-propulsive effort (engine retarder) of driving engine 1 and the part of the friction of toric transmission 4; correspondingly; regenerating braking energy is caused to decline, energy regeneration deterioration of efficiency.
Therefore, when starting regenerative brake in the traveling in HEV mode and lower than regulation vehicle velocity V SP1, by the release of power-transfer clutch CL, driving engine 1 and speed-changing mechanism CVT being cut off from drive wheel 5, moves to the traveling of EV pattern.Thus, as EV reproduced state, the friction that reduction driving engine 1 and toric transmission 4 cause, correspondingly obtains energy regeneration amount.
In addition, when being travelled by EV pattern, from the viewpoint of oil consumption, by again starting (recovering fuel oil injection) of sliding that mode that termination (fuel-cut) that the fuel to driving engine 1 that performs in traveling sprays also continues when the release of power-transfer clutch CL forbids spraying to the fuel of driving engine 1, driving engine 1 is stopped.
(maintaining about the converter speed ratio of EV pattern)
Then, the converter speed ratio maintenance of EV pattern is described.Such as, as shown in arrow (a) shown in the mode chart of Fig. 4, when reducing speed now by brake service from HEV regeneration zone and enter EV regeneration zone and become EV reproduced state, just power-transfer clutch CL is discharged, driving engine 1 is stopped.Thereafter, as shown in the arrow (b) of Fig. 4, when ask by depressing accelerator pedal 19 propulsive effort become regulation above time, just move to HEV power operation area.Equally, such as, as shown in the arrow (c) of Fig. 4, when becoming EV reproduced state by utilizing brake service to be entered EV regeneration zone from accelerator pedal 19 by the HEV power operation area depressed, just power-transfer clutch CL is discharged, driving engine 1 is stopped.Thereafter, as shown in the arrow (d) of Fig. 4, when ask by depressing accelerator pedal 19 propulsive effort become regulation above time, just move to HEV power operation area.Now, utilize self-starting motor 3 that driving engine 1 is restarted, and power-transfer clutch CL is connected, be switched to HEV mode from EV pattern.
Like this, will speed up the situation of having carried out the driving depressed again after device pedal 19 discharges or mainly forced carry out the running environment of that driving under use vehicle when, or namely before vehicle stops, drg release is depressed this situation of accelerator pedal 19 (below depressing under brake pedal 16 carries out the state of slowing down, describe for a change idea) under, the switching from EV pattern to HEV mode must be carried out.
Here, the change of converter speed ratio when not supplying oil pressure to speed-changing mechanism CVT when the traveling of EV pattern is described.Fig. 5 is the counteractive skeleton diagram of effect of the power of the speed-changing mechanism representing embodiment 1.The speed-changing mechanism CVT of embodiment 1 receives the secondary spring SEC_SPR being provided with the direction pressing narrowed to secondary pulley groove width in the pulley compartment of secondary pulley 7.
Thus, when oil pressure pressure release (decline) in the oil pressure in primary pulley 6 or secondary pulley 7, the secondary thrust Fsec that secondary spring SEC_SPR realizes just becomes can overriding power, and the power that secondary pulley groove width is narrowed plays a role.Thereupon, V-type band 8 produces tension force fs (following, to describe as secondary tension force), and be pulled to secondary pulley 7 side by V-type band 8, the power that the groove width of primary pulley 6 broadens plays a role.
Release order although export basically by power-transfer clutch CL but in fact pulling of wet goods can occur, and on each belt wheel, produce small rotation, when power as shown in Figure 5 plays a role in this condition, what the converter speed ratio with regard to producing speed-changing mechanism CVT became low speed (Low) side returns low speed (low).Such as, even if in the non-rotary situation of each belt wheel, also by V-type band 8 longitudinal sliding motion along the movement of direction, footpath in pulley groove, the converter speed ratio of speed-changing mechanism CVT still becomes low speed side.
That is, when travelling with EV pattern, when not supplying any oil pressure to speed-changing mechanism CVT, by the time through or the decline degree of oil pressure, converter speed ratio becomes low speed side gradually.Sometimes also by the size of secondary thrust Fsec, final speed change is to dead slow converter speed ratio.In the traveling of EV pattern, become driving engine 1 and stop and the state that having discharged of power-transfer clutch CL, therefore, the rotation of speed-changing mechanism CVT also stops or becoming extremely low rotating speed.Therefore, can not detection of primary rotating speed or secondary rotating speed, in travelling with EV pattern, actual converter speed ratio can not be detected.
So, when outputing the mode switch request from EV pattern to HEV mode along with unthinking, need first driving engine 1 is started and speed-changing mechanism CVT is rotated, then converter speed ratio is detected, after having carried out variable speed control, carry out the connection of power-transfer clutch CL, there is the problem of to lose time and so on pattern switches.
In addition, such as, when being switched to EV pattern from HEV mode, also considering by prior speed change, to dead slow converter speed ratio, to identify converter speed ratio in advance, get rid of testing process.But, in this case, before being switched to EV pattern, need speed change to arrive low speed side, EV pattern can not be switched to rapidly, be difficult to the reduction realizing oil consumption.
When further speed change is to dead slow converter speed ratio, just switch to HEV mode from EV pattern in higher speed of a motor vehicle side, in this case, in order to realize the synchronization with driven wheel side, need to make engine speed increase, cause the acceleration request relative to chaufeur and the delayed situation of the build up time of engine speed.When making engine speed synchronously be connected by power-transfer clutch CL with last gas, although outputing acceleration request, also causing that traction occurs and impacting, bringing sense of discomfort to chaufeur.
Even if suppose under the state of EV pattern, also the converter speed ratio of speed-changing mechanism CVT is usually made to carry out speed change according to speed change figure, even if then which moment there occurs the switching from EV pattern to HEV mode in, all can not produce on power-transfer clutch CL and relatively rotate, so can promptly switch mode.But, in order to make the speed-changing mechanism CVT speed change of non-rotating state forcibly, as the output of electrodynamic type oil pump EO/P, require very large output, except the increase causing energy consumption, also likely cause the problem that the vehicle boarded property come along with maximization is deteriorated.
Therefore, in embodiment 1, when have issued the request switched to EV pattern (EV reproduced state) in the deceleration of HEV mode, in order to the converter speed ratio of the toric transmission 4 by this moment is maintained in regulation converter speed ratio, electrodynamic type oil pump EO/P be made to work.
(about converter speed ratio maintenance method)
Here, to being described from HEV mode to the method being maintained regulation converter speed ratio during the switching of EV pattern.Fig. 6 is the characteristic map of the relation of the counteractive relation of effect of the power of the speed-changing mechanism representing Fig. 5 and the oil pressure required for converter speed ratio maintenance.When producing secondary thrust Fsec by secondary spring SEC_SPR, just produce the secondary tension force fs corresponding with converter speed ratio.Now, when being conceived to primary pulley 6, the sliding resistance (following description is speed change resistance Fr) of belt wheel and V-type band 8 acts on the direction of the movement hindering V-type band 8 usually.
The setting load of secondary spring SEC_SPR is set greater than the size of sliding resistance Fr in whole converter speed ratio regions.Now, primary pulley 6 produces the oil pressure of regulation, and produce tension force fp.The size of this tension force fp is determined by the oil pressure of supply regulation, becomes the value less than speed change resistance Fr to make Tension Difference between belt wheel (| fs-fp|).Such as, as shown in the heavy line of Fig. 6, when value all setting in which converter speed ratio region in the tension range that secondary spring SEC_SPR obtains as become, between belt wheel, Tension Difference just can be set as less than speed change resistance Fr, only supply lower regulation oil pressure, just can maintain converter speed ratio.
(converter speed ratio maintenance control treatment)
Fig. 7 is the diagram of circuit of the converter speed ratio maintenance control treatment of the EV pattern representing embodiment 1.
In step sl, to determine whether in EV pattern and electrodynamic type oil pump EO/P whether at work, when judging not to be EV pattern (being HEV mode) or electrodynamic type oil pump EO/P to be off working state, enter step S10, beyond it, enter step S2.
In step s 2, judge whether the request continuing to select EV pattern, when lasting selection EV pattern, enter step S3, beyond it, enter step S13.
In step s3, judge the work-hours of electrodynamic type oil pump EO/P be whether presetting continuous working allowed time (such as, 3 minutes) more than, if the not enough continuous working allowed time, then enter step S4, when the work-hours of electrodynamic type oil pump EO/P is more than the continuous working allowed time, enter step S13, electrodynamic type oil pump EO/P is set to inoperative and (is judged as that electrodynamic type oil pump EO/P becomes high temperature, forbid the work of electrodynamic type oil pump EO/P), and select HEV mode to replace EV pattern.In this case, mechanical type oil pump O/P replaces electrodynamic type oil pump EO/P and works.Then, enter step S14, as be set in speed change figure shift cable shown in, carry out converter speed ratio control.
In step slo, judge whether the transiting requests of oriented EV pattern, when having from HEV mode to the transiting requests of EV pattern, entering step S11, beyond it, entering step S13, select HEV mode.In this case, because mechanical type oil pump O/P works, so electrodynamic type oil pump EO/P is set to inoperative.Then, enter step S14, as be set in speed change figure shift cable shown in, carry out converter speed ratio control.
In step s 11, judge whether electrodynamic type oil pump EO/P is following state: the past is for more than the continuous working allowed time, the result of continuous working is, not stop, but stop by means of only HEV mode, when being judged as the state stopped by HEV mode, enter step S4, select EV pattern, electrodynamic type oil pump EO/P continuous firing.Meanwhile, close secondary pulley piezoelectricity magnetic coil 37-2, and control the aperture of primary pulley piezoelectricity magnetic coil 37-1, oil pressure from electrodynamic type oil pump EO/P is not be supplied in secondary pulley 7, but be only supplied in primary pulley 6, the converter speed ratio in EV pattern is maintained the converter speed ratio (step S5) when switching from HEV mode to EV pattern.
At this, to being described in detail of the regulation converter speed ratio when switching from HEV mode to EV pattern and in mode transition.Fig. 8 is the detailed time diagram that the converter speed ratio represented in the mode transition of embodiment 1 maintains.When the moment t (A) in HEV mode and in travelling carries out the handoff request to EV pattern, just controlling by releasing order to power-transfer clutch CL output, becoming 0 to make connection capacity.In addition, driving engine 1 recovers forbidding of control by fuel-cut, carries out engine stop.With it, secondary rotating speed, elementary rotating speed and engine speed carry out inertial rotation from moment t (A), and rotating speed declines gradually simultaneously, finally stops at moment t (B).By the decline of this rotating speed, the discharge rate of mechanical type oil pump O/P declines, and oil pressure declines thus, and by the setting load of secondary spring SEC_SPR, produce and return low speed, the converter speed ratio of speed-changing mechanism CVT changes to low speed side gradually.
Now, from moment t (A) to t (B) period in transition, that is, in primary pulley 6 or secondary pulley 7 all also under the state rotated, based on rotating speed, the converter speed ratio of speed-changing mechanism CVT can be detected.Thus, as long as maintain moment of converter speed ratio or the regulation converter speed ratio that is maintained is set properly, after being not limited to the instruction outputing pattern switching etc. under the state that namely can identify converter speed ratio from HEV mode in the transition of EV pattern.
In step s 12, after judging to stop more than electrodynamic type oil pump EO/P is by the work continuous working allowed time, whether have passed through the specified time required for cooling of electrodynamic type oil pump EO/P (such as, 1 minute), when be judged as process because electrodynamic type oil pump EO/P can work, so enter step S4, select EV pattern, electrodynamic type oil pump EO/P is worked.On the other hand, when being judged as without required specified time, because electric oil pump EO/P can not work, so enter step S13, even if the transiting requests of oriented EV pattern, also selects HEV mode, electrodynamic type oil pump EO/P is set to off working state simultaneously, in step S14, usually converter speed ratio is set to state of a control.Thus, can not switch to HEV mode from EV pattern, because usually guarantee oil pressure by mechanical type oil pump O/P, impact so traction can not be produced.
(converter speed ratio when vehicle unthinks before stopping maintains the effect of control treatment)
Based on above-mentioned diagram of circuit, effect is described.First, following scene is described: in deceleration, is switched to EV pattern from HEV mode, thereafter, do not make vehicle stop but depressing accelerator pedal 19 (unthinking) in midway, being again switched to HEV mode.
(based on the comparison the effect of example)
The problem of following situation as comparative example is described, this situation is, when electrodynamic type oil pump EO/P being set to the situation of usual inoperative or not possessing the unit of electrodynamic type oil pump EO/P, after be transitioned into EV pattern from HEV mode, by unthinking, be transitioned into HEV mode.Fig. 9 is time diagram when not producing oil pressure when EV pattern in the motor vehicle driven by mixed power of comparative example.Initial motoring condition is will speed up device pedal 19 to discharge and the deceleration regime depressing the HEV mode of brake pedal 16.
When moment t1, because vehicle velocity V SP drops to the speed of a motor vehicle setting EV regeneration zone in mode chart, so be switched to EV reproduced state from HEV reproduced state.Thus, power-transfer clutch CL is released, and driving engine 1 stops, and thereupon, the oil pressure of mechanical type oil pump O/P also becomes 0.Thus, the converter speed ratio of speed-changing mechanism CVT changes (returning low speed) to dead slow converter speed ratio gradually by the Clamping force of secondary spring SEC_SPR.
When moment t2, chaufeur, by unthinking, depresses accelerator pedal 19 from deceleration regime, carries out acceleration request.Then, when moment t3, when accelerator pedal aperture APO increases to the region setting the operation of HEV power in mode chart, be just switched to HEV mode (HEV power running state) from EV pattern (EV reproduced state).
Now, be in the state that the outgoing side rotating speed (value corresponding with the speed of a motor vehicle) of power-transfer clutch CL is higher, on the other hand, the converter speed ratio of speed-changing mechanism CVT changes to dead slow converter speed ratio.Thus, after the engine is started up, and by power-transfer clutch CL connect before, elementary rotating speed is slowed down by speed-changing mechanism CVT, and it is low rotating speed that secondary rotating speed becomes relative to elementary rotating speed, so cause secondary rotating speed to become the low rotating speed of specific output side rotating speed.When being connected by power-transfer clutch CL in this condition, secondary rotating speed just rises along with outgoing side rotating speed, and thereupon, elementary rotating speed (engine speed) becomes hyper-speed state, likely brings sense of discomfort to chaufeur.In addition, because move to complete coupled situation from the state that the outgoing side rotating speed of secondary revolution ratio power-transfer clutch CL is low, impact so produce traction on the drive wheel.That is, chaufeur carries out acceleration request to depress accelerator pedal 19, makes engine speed surplus increase, and then produces traction impact, so become very large sense of discomfort.
(effect based on embodiment 1)
Then, embodiment 1 is described.Figure 10 is time diagram when making electrodynamic type oil pump EO/P work and produce oil pressure in the motor vehicle driven by mixed power of embodiment 1 when EV pattern.Initial motoring condition is will speed up device pedal 19 to discharge and the deceleration regime of HEV mode after depressing brake pedal 16.
When moment t11, because vehicle velocity V SP drops to the region setting EV regeneration in mode chart, so be switched to EV reproduced state from HEV reproduced state.Thus, power-transfer clutch CL is released, and driving engine 1 stops, and thereupon, the oil pressure of mechanical type oil pump O/P also becomes 0.Now, in order to make electrodynamic type oil pump EO/P work, oil pressure to a certain degree be guaranteed, primary pulley 6 produces the oil pressure of regulation, the converter speed ratio of speed-changing mechanism CVT be maintained converter speed ratio when being switched to EV pattern from HEV mode.
When moment t21, chaufeur depresses accelerator pedal 19 by unthinking from deceleration regime, carries out acceleration request.Then, when moment t31, when accelerator pedal aperture APO increases to the region setting the operation of HEV power in mode chart, be just switched to HEV power running state from EV reproduced state.
Now, be in the state that the outgoing side rotating speed (speed of a motor vehicle is worth accordingly) of power-transfer clutch CL is higher, on the other hand, the converter speed ratio of speed-changing mechanism CVT maintains converter speed ratio when being switched to EV pattern from HEV mode.Converter speed ratio when being switched to EV pattern from HEV mode is switch sliding motoring condition substantially, so shown in speed change figure as shown in Figure 3, be set with the converter speed ratio along sliding line.Thus, when being switched to EV pattern from HEV mode in the speed of a motor vehicle of the arrow (a) of Fig. 4, switch under the converter speed ratio of speed-changing mechanism CVT becomes most higher speed gear ratio or the state than 1 more by the converter speed ratio of high-speed side.
In addition, when being switched to EV pattern from HEV mode in the speed of a motor vehicle of the arrow (c) of Fig. 4, when depressing accelerator pedal 19 in the traveling in HEV mode, can hypothetical model switch before converter speed ratio be positioned at situation near dead slow converter speed ratio.Here, whenever power-transfer clutch CL being discharged along with the switching to EV pattern, all with " brake pedal 16 depress time have passed through more than specified time (such as, more than 2 seconds) " for release conditions.Thus, the most high-speed line of the fast mode of Fig. 3 is selected when being released by accelerator pedal 19, and by converter speed ratio near dead slow converter speed ratio to most higher speed gear ratio upshift time, just by power-transfer clutch release conditions, guarantee shifting time, near converter speed ratio speed change to most higher speed gear ratio or most higher speed gear ratio (converter speed ratio at least than 1 more by high-speed side), and maintain this converter speed ratio.
Thus, when driving engine is restarted, if engine speed breaks out completely along with driving engine and temporarily rises, then this rotating speed just speedup by speed-changing mechanism CVT, makes secondary rotating speed rise, so become the also high state of secondary revolution ratio outgoing side rotating speed.Because move to complete coupled situation from this state, impact so traction can not be produced on drive wheel 5.That is, when chaufeur depress accelerator pedal 19 carry out acceleration request time, engine speed can not superfluous rise, and avoids traction to impact, can switch to HEV mode.
In addition, as shown in Figure 3, when become extremely the low speed of a motor vehicle time, driving engine 1 under the state of most higher speed gear ratio will be caused lower than idling speed, to cause engine off, be set as declining along with the speed of a motor vehicle and downshifting to dead slow converter speed ratio so slide line.Like this, in extremely low vehicle-speed region, depressing suddenly brake pedal 16 from the HEV mode temporarily depressing accelerator pedal 19 widely before the speed of a motor vehicle rises in the scene of the switching of EV pattern, the converter speed ratio be maintained likely becomes the converter speed ratio of the speed-changing mechanism CVT low speed side lower than 1.But, in particular cases this, as long as suppressed traction to be impacted by the high-speed side that temporarily upshiftd to by speed-changing mechanism CVT before power-transfer clutch CL connects by next time completely, there is no special problem.
In addition, as shown in the speed change figure of Fig. 3, will speed up device pedal 19 discharge after state under the target change gear ratio that sets be substantially along the most higher speed gear ratio of the most high-speed line of fast mode.But, as mentioned above, when being set with dead slow converter speed ratio when supposing in HEV mode, even if being only set as that the most higher speed gear ratio of specified time (the such as 2 seconds) introversion of power-transfer clutch release conditions carries out speed change to during the switching of EV pattern, sometimes can not speed change to most higher speed gear ratio.Now, regulation converter speed ratio is defined as by realizing MIN converter speed ratio.
Now, imagination switches from HEV mode to EV pattern and speed-changing mechanism CVT is maintained the state of regulation converter speed ratio.In this condition, chaufeur slowly depresses accelerator pedal 19, and under the EV power running state of EV pattern, the speed of a motor vehicle rises, and as power operating speed VSPX shown in the mode chart reaching Fig. 4, just exports the mode switch request from EV pattern to HEV mode.Now, when when being restarted by driving engine, engine speed temporarily rises along with driving engine breaks out completely, this rotating speed just by regulation converter speed ratio, makes secondary rotating speed rise.Now, the secondary rotating speed after power operating speed VSPX is set in rising becomes in the speed of a motor vehicle territory of the rotating speed of more than the outgoing side rotating speed of power-transfer clutch CL.Namely, the power operating speed VSPX being set with EV power operation area is set as, even speed-changing mechanism CVT any one converter speed ratio maintainable, engine speed all can not superfluously when switching to HEV mode rise, and traction can be avoided to impact and be switched to the speed of a motor vehicle of HEV mode.
(comprise vehicle and stop at the effect that interior converter speed ratio maintains control treatment)
Figure 11 has carried out comprising vehicle to stop at interior converter speed ratio and maintain time diagram when controlling.Here, as comparative example, illustrative is when being set to the converter speed ratio returning low speed and formed in EV pattern, and when have passed through specified time after being switched to EV pattern, with regard to the example of automatic speed changing to dead slow converter speed ratio.
(based on the comparison the effect of example)
Initial motoring condition is will speed up device pedal 19 to discharge and the deceleration regime having depressed the HEV mode of brake pedal 16.
When moment t11, because vehicle velocity V SP drops to the speed of a motor vehicle setting EV regeneration zone in mode chart, so be switched to EV pattern (EV reproduced state) from HEV mode (HEV reproduced state).Thus, power-transfer clutch CL is released, and driving engine 1 stops, and thereupon, the oil pressure of mechanical type oil pump O/P also becomes 0.Thus, the converter speed ratio of speed-changing mechanism CVT changes to dead slow converter speed ratio gradually.
When moment t12, even if because vehicle stops, be also EV pattern, so converter speed ratio control etc. can not be carried out especially.Then, when moment t13, chaufeur starts to depress accelerator pedal 19, carries out acceleration request.Then, when moment t14, when vehicle velocity V SP increases to the power operating speed VSPX setting the operation of HEV power in mode chart, just switch from EV pattern (EV reproduced state) to HEV mode (HEV power running state).
Now, be in the state that the outgoing side rotating speed (value corresponding with the speed of a motor vehicle) of power-transfer clutch CL is higher, on the other hand, the converter speed ratio of speed-changing mechanism CVT changes to dead slow converter speed ratio.Thus, after the engine is started up, and by power-transfer clutch CL connect before, elementary rotating speed is slowed down, so cause secondary rotating speed to become the low rotating speed of specific output side rotating speed by speed-changing mechanism CVT.When being connected by power-transfer clutch CL in this condition, secondary rotating speed just rises along with outgoing side rotating speed, and thereupon, elementary rotating speed (engine speed) becomes hyper-speed state, likely brings sense of discomfort to chaufeur.In addition, because be that the state lower than the outgoing side rotating speed of power-transfer clutch CL moves to complete coupled situation from secondary revolution ratio, impact so traction can be produced on the drive wheel.That is, chaufeur carries out acceleration request to depress accelerator pedal 19, makes engine speed surplus increase, and then produces traction impact, so become very large sense of discomfort.
(effect based on embodiment 1)
Then, embodiment 1 is described.
When moment t11, because vehicle velocity V SP drops to the speed of a motor vehicle setting EV regeneration zone in mode chart, so switch from HEV mode (HEV reproduced state) to EV pattern (EV reproduced state).Thus, power-transfer clutch CL is released, and driving engine 1 stops, and thereupon, the oil pressure of mechanical type oil pump O/P also becomes 0.Now, in order to make electrodynamic type oil pump EO/P work, oil pressure to a certain degree be guaranteed, primary pulley 6 produces the oil pressure of regulation, the converter speed ratio of speed-changing mechanism CVT be maintained converter speed ratio when being switched to EV pattern from HEV mode.
When moment t12, even if because vehicle stops, be also EV pattern, so electrodynamic type oil pump EO/P continues to be driven, continue to maintain converter speed ratio.Then, when moment t13, chaufeur starts to depress accelerator pedal 19, carries out acceleration request.Then, when moment t14, when vehicle velocity V SP increases to the power operating speed VSPX setting HEV power operation area in mode chart, just switch from EV pattern (EV reproduced state) to HEV mode (HEV power running state).
Now, be in the state that the outgoing side rotating speed (value corresponding with the speed of a motor vehicle) of power-transfer clutch CL is higher, on the other hand, the converter speed ratio of speed-changing mechanism CVT maintains converter speed ratio when being switched to EV pattern from HEV mode.Converter speed ratio when being switched to EV pattern from HEV mode is switch sliding motoring condition substantially, so shown in speed change figure as shown in Figure 3, be set with the converter speed ratio along sliding line.Thus, when switching from HEV mode to EV pattern in the speed of a motor vehicle of the arrow (a) of Fig. 4, switch under the converter speed ratio of speed-changing mechanism CVT is most higher speed gear ratio or the state than 1 more by the converter speed ratio of high-speed side.
In addition, when switching from HEV mode to EV pattern in the speed of a motor vehicle of the arrow (c) of Fig. 4, when depressing accelerator pedal 19 in the traveling in HEV mode, can hypothetical model switch before converter speed ratio be positioned at situation near dead slow converter speed ratio.Here, whenever power-transfer clutch CL being discharged along with the switching to EV pattern, all with " brake pedal 16 depress time have passed through more than 2 seconds " for release conditions.Thus, be released by accelerator pedal 19, select the most high-speed line of the fast mode of Fig. 3, by converter speed ratio near dead slow converter speed ratio to most higher speed gear ratio upshift time, by power-transfer clutch release conditions, guarantee shifting time, near converter speed ratio speed change to most higher speed gear ratio or most higher speed gear ratio (converter speed ratio at least than 1 more by high-speed side), and maintain this converter speed ratio.
Thus, when driving engine is restarted, if engine speed breaks out completely along with driving engine and temporarily rises, then this rotating speed just speedup by speed-changing mechanism CVT, makes secondary rotating speed rise, so secondary rotating speed becomes the high state of specific output side rotating speed.Because move to complete coupled situation from this state, impact so traction can not be produced on drive wheel 5.That is, when chaufeur depress accelerator pedal 19 carry out acceleration request time, engine speed can not superfluous rise, and avoids traction to impact, can switch to HEV mode.In addition, when needing when the connection of power-transfer clutch CL speed-changing mechanism CVT is downshifted, perform downshift by variable speed control, while connected by power-transfer clutch CL, thereby, it is possible to realize the request propulsive effort of chaufeur.
(about the process of electrodynamic type operation of oil pump)
Then, work disposal when having from HEV mode to the handoff request of EV pattern and electrodynamic type oil pump EO/P is worked is described.Figure 12 is the diagram of circuit of the electrodynamic type operation of oil pump process representing embodiment 1.
In the step s 21, the transiting requests from HEV mode to EV pattern is exported.
In step S22, driving engine 1 is switched to disconnection (halted state) from connection (mode of operation).Specifically, fuel is stopped to spray.
In step S23, judge the whether not enough specified value of pipeline pressure, when not enough specified value, enter step S27, export the work order of electrodynamic type oil pump EO/P.
In step s 24 which, judge the whether not enough specified value of the discharge pressure of mechanical type oil pump O/P, when not enough specified value, enter step S27, export the work order of electrodynamic type oil pump EO/P.
In step s 25, judge the whether not enough specified value of engine speed, when not enough specified value, enter step S27, export the work order of electrodynamic type oil pump EO/P.
In step S26, judge the whether not enough specified value of the rotating speed of mechanical type oil pump O/P, when not enough specified value, enter step S27, export the work order of electrodynamic type oil pump EO/P.
Figure 13 is the time diagram of the electrodynamic type operation of oil pump process representing embodiment 1.Namely, whenever making electrodynamic type oil pump EO/P work, when meeting the arbitrary condition in the rotating speed decline of the discharge drops of pipeline drops or mechanical type oil pump O/P or the drive source of mechanical type oil pump O/P and engine speed decline or mechanical type oil pump O/P all actually, be judged as making electrodynamic type oil pump EO/P work, object is in order to ensure the oil pressure for maintaining converter speed ratio.Thus, electrodynamic type oil pump EO/P can not be unnecessarily driven, and can suppress power consumption.In addition, because to the instruction of electrodynamic type oil pump EO/P output services in fact discharge press rise during there is response lag, so imaginary pipeline pressure instantaneous drop to 0 scene, but the converter speed ratio of speed-changing mechanism CVT sharply can not change to low speed side, so there is no large problem by instantaneous decline.
(stopping process about electrodynamic type oil pump)
Then, the stopping process to the handoff request had from EV pattern to HEV mode and when electrodynamic type oil pump EO/P is stopped is described.Figure 14 represents that the electrodynamic type oil pump of embodiment 1 stops the diagram of circuit of process.
In step S31, export the transiting requests from EV pattern to HEV mode.
In step s 32, driving engine 1 is switched to connection (mode of operation) from disconnection (halted state).Specifically, drive self-starting motor, again start fuel and spray.
In step S33, judge whether pipeline pressure is more than specified value, time more than specified value, enters step S37, export the inoperative instruction of electrodynamic type oil pump EO/P.
In step S34, judge whether the discharge pressure of mechanical type oil pump O/P is more than specified value, time more than specified value, enter step S37, export the inoperative instruction of electrodynamic type oil pump EO/P.
In step s 35, judge whether engine speed is more than specified value, time more than specified value, enters step S37, export the inoperative instruction of electrodynamic type oil pump EO/P.
In step S36, judge whether the rotating speed of mechanical type oil pump O/P is more than specified value, time more than specified value, enter step S37, export the inoperative instruction of electrodynamic type oil pump EO/P.
Figure 15 represents that the electrodynamic type oil pump of embodiment 1 stops the time diagram of process.Namely; whenever making electrodynamic type oil pump EO/P stop; when meeting the discharge pressure guaranteed pipeline pressure or guarantee mechanical type oil pump O/P or the drive source guaranteeing mechanical type oil pump O/P and engine speed all actually or guarantee the arbitrary condition in the rotating speed of mechanical type oil pump O/P; be judged as the state becoming variable-ratio from the state maintaining converter speed ratio, electrodynamic type oil pump EO/P inoperative should be made.Thus, electrodynamic type oil pump EO/P can be driven necessarily, can suppress power consumption.In addition, because export inoperative instruction to electrodynamic type oil pump EO/P under the state that ensure that oil pressure, so pipeline pressure instantaneously can not drop to 0, can realize ensure that the converter speed ratio of responsibility controls.
As mentioned above, in embodiment 1, the following action effect enumerated can be obtained.
(1-1) a kind of motor vehicle driven by mixed power, there is driving engine 1, speed-changing mechanism CVT (toric transmission) and electrical motor 2 (drive motor), be provided with by electrical motor 2 drive wheel 5 driven or regenerative brake time, the power-transfer clutch CL that can will discharge between drive wheel 5 and speed-changing mechanism CVT, wherein, possesses the hybrid controller 24 driving engine 1 being stopped when being discharged by power-transfer clutch CL (following, describe as controller), controller, when making driving engine 1 stop, maintaining the converter speed ratio of speed-changing mechanism CVT.
Thus, promptly can switch from HEV mode to EV pattern, the improvement of oil consumption can be realized.In addition, because when switching from EV pattern to HEV mode, also maintain converter speed ratio, so excessive engine speed will be caused to rise by suppressing to return low speed, the sense of discomfort brought to chaufeur can be suppressed.
(2-2) the mechanical type oil pump O/P being driven by driving engine 1 and supply oil pressure to speed-changing mechanism CVT is possessed, controller is when making engine stop by EV pattern, utilize electrodynamic type oil pump EO/P to supply oil pressure to speed-changing mechanism CVT, maintain the converter speed ratio of speed-changing mechanism CVT.
Thus, promptly can switch from HEV mode to EV pattern, the improvement of oil consumption can be realized.In addition, because when switching from EV pattern to HEV mode, converter speed ratio also can not speed change to dead slow side, so excessive engine speed can not be caused to rise, the sense of discomfort brought to chaufeur can be suppressed.In addition, because the state that the input side revolution ratio outgoing side rotating speed that can maintain power-transfer clutch CL is high, so the traction impact etc. that the connection of power-transfer clutch CL can either be avoided to cause, the pattern rapidly that can realize again switches.In addition, required oil pressure can be suppressed to Min., cheap and small-sized electrodynamic type oil pump EO/P can be adopted.In addition, " when being switched to EV pattern from HEV mode " can be switching command moment from from HEV mode to EV pattern identical with the release moment of power-transfer clutch CL time the switching command moment.When power-transfer clutch CL being discharged after the switching command moment, as long as maintain the converter speed ratio of any instant.Such as, when hope from the switching command moment by converter speed ratio speed change is to high-speed side to a certain degree, sometimes preferably maintain power-transfer clutch release the moment converter speed ratio.
(3-3) speed-changing mechanism CVT has: primary pulley 6, secondary pulley 7, the secondary spring SEC_SPR (elastic body) being wrapping with band 8 (annular flexible parts) between two belt wheels, producing the Clamping force of secondary pulley 7, controller, by supplying constant pressure to primary pulley 6, maintains converter speed ratio.
Namely, by supplying constant pressure, and utilize based on the tension force of secondary spring SEC_SPR, the sliding resistance between band 8 and each belt wheel 6,7, can the relation of clamping band and belt wheel, so when making electrodynamic type oil pump EO/P work, can by simply controlling to maintain converter speed ratio.
(4-4) controller supplies constant pressure with the secondary tension force produced on band 8 by secondary spring SEC_SPR with by the constant absolute value being pressed in the difference of the elementary tension force that band 8 produces than the mode little by the resistance tension force of the sliding resistance generation produced between each belt wheel 6,7 and band 8.
Thus, by the MIN oil pressure supply of necessity, converter speed ratio can be maintained, because the discharge ability that electrodynamic type oil pump EO/P asks diminishes, so can realize the miniaturization of electrodynamic type oil pump EO/P.
(5-5), when controller stops under EV pattern, continue to maintain the converter speed ratio be also maintained in parking.
That is, when vehicle will stop, consider the starting after stopping, usually make the converter speed ratio of speed-changing mechanism CVT turn back to dead slow converter speed ratio.But, when having turned back to dead slow converter speed ratio before the starting in EV pattern, just after starting to walk with EV pattern, the speed of a motor vehicle rises, when carrying out the switching from EV pattern to HEV mode, if the power-transfer clutch CL of correspondence is connected, then by the rising of engine speed, become the state that the outgoing side rotating speed of secondary revolution ratio power-transfer clutch CL is low, engine speed is superfluous because of the connection of power-transfer clutch CL to rise, thus, likely sense of discomfort is brought to chaufeur.
On the other hand, by maintaining from HEV mode to the converter speed ratio during switching of EV pattern, complete coupled situation can be moved to from the state that the outgoing side rotating speed of secondary revolution ratio power-transfer clutch CL is high, traction can not be produced on the drive wheel and impact.That is, when chaufeur depress accelerator pedal 19 carry out acceleration request time, will engine speed can not be superfluous rise, also can not produce traction impact state under switch to HEV mode.In addition, when needing when power-transfer clutch CL connects speed-changing mechanism CVT is downshifted, perform downshift limit by lateral dominance variable speed control and power-transfer clutch CL is connected, the request propulsive effort of chaufeur can be realized.
(6-6), when any one in the rotating speed deficiency regulation rotating speed of the rotating speed deficiency regulation rotating speed of the not enough regulation pressure of discharge pressure of the pipeline pressure not enough regulation pressure of the oil hydraulic circuit being oil pressure source with mechanical type oil pump O/P, mechanical type oil pump O/P, driving engine 1, mechanical type oil pump O/P of controller is set up, electrodynamic type oil pump EO/P is started working.
Thus, electrodynamic type oil pump EO/P can be driven necessarily, can suppress power consumption.
(7-9) controller is when the pipeline pressure of the oil hydraulic circuit being oil pressure source with mechanical type oil pump O/P is for specifying the discharge pressure of more than pressure, mechanical type oil pump O/P for specifying the rotating speed of more than pressure, driving engine 1 for specifying the rotating speed of more than rotating speed, mechanical type oil pump O/P for specifying that rotating speed is set up with upper any one, the work of stopping electrodynamic type oil pump EO/P.
Thus, electrodynamic type oil pump EO/P can be driven necessarily, can suppress power consumption.In addition, because export inoperative instruction to electrodynamic type oil pump EO/P under the state that ensure that oil pressure, so pipeline pressure instantaneously can not drop to 0, can realize ensure that the converter speed ratio of responsibility controls.
(8-10) have when defined terms is set up, forbid the step S11 (electrodynamic type operation of oil pump inhibiting apparatus) of the work of electrodynamic type oil pump EO/P, controller is when forbidding the work of electrodynamic type oil pump EO/P, even the driving condition of EV pattern should be selected, also forbid EV pattern, select HEV mode.
Thus, can not switch to HEV mode from EV pattern, because usually guaranteeing oil pressure by mechanical type oil pump O/P, so can avoid can not get the work of electrodynamic type oil pump EO/P and the problem of converter speed ratio and so on can not be maintained, traction can not be produced and impact.
(embodiment 2)
Then, embodiment 2 is described.Because basic structure is identical with embodiment 1, only difference is described.Figure 16 is the diagram of circuit of the electrodynamic type operation of oil pump process representing embodiment 2.In embodiment 1, detect the oil pressure state in actual oil hydraulic circuit, judge that the work of electrodynamic type oil pump EO/P starts.On the other hand, in example 2, following this point is different: when having from HEV mode to the transiting requests of EV pattern, as shown in step S210, carry out the action of electrodynamic type oil pump EO/P immediately, thereafter, in step S22, driving engine 1 is switched to disconnection from connection.In other words, before the stopping of driving engine 1, electrodynamic type oil pump EO/P is worked.
Figure 17 is the time diagram of the electrodynamic type operation of oil pump process representing embodiment 2.Like this, because make electrodynamic type oil pump EO/P work, even if so pressed response lag in electrodynamic type oil pump EO/P actual output discharge from work order, the state as greatly declined in pipeline pressure also can be avoided before driving engine 1 stops.
As mentioned above, in example 2, following action effect can be obtained.
(9-7) controller output refer to from HEV mode to the switching of EV pattern time, electrodynamic type oil pump EO/P is worked.
Thus, because electrodynamic type oil pump EO/P can be made to start working before the work of mechanical type oil pump O/P stops, so the state of affairs as greatly declined in pipeline pressure can be avoided, stable converter speed ratio can be realized and control.
(embodiment 3)
Then, embodiment 3 is described.Because basic structure is identical with embodiment 1, only difference is described.Figure 18 represents that the electrodynamic type oil pump of embodiment 3 stops the diagram of circuit of process.In embodiment 1, detect the oil pressure state in actual oil hydraulic circuit, judge the stopping of electrodynamic type oil pump EO/P.On the other hand, in embodiment 3, following this point is different: when there being the transiting requests from EV pattern to HEV mode, as shown in step S310, carry out the inoperative instruction of electrodynamic type oil pump EO/P immediately, thereafter, in step s 32, driving engine 1 is switched to connection from disconnection.In other words, before the work of driving engine 1, electrodynamic type oil pump EO/P is stopped.
Figure 19 represents that the electrodynamic type oil pump of embodiment 3 stops the time diagram of process.Like this, because made the work of electrodynamic type oil pump EO/P stop before driving engine 1 works, although so the scene having pipeline pressure delayed etc. because the discharge pressure of the delayed of engine starting moment or thing followed mechanical type oil pump O/P produces and decline, but electrodynamic type oil pump EO/P can be made to stop rapidly, can power consumption be suppressed.
As mentioned above, in embodiment 3, following action effect can be obtained.
(10-8) controller is when outputing the switching command from EV pattern to HEV mode, and the work of electrodynamic type oil pump EO/P is stopped.
Thus, the corresponding mechanical type oil pump O/P of electrodynamic type oil pump EO/P can be made to start working and stop, useless power consumption can be suppressed.
(embodiment 4)
Then, embodiment 4 is described.Because basic structure is identical with embodiment 1, only difference is described.Figure 20 be represent embodiment 4 speed-changing mechanism and carry out oil pressure cntrol magnet coil outline figure.In embodiment 1, when driving engine 1 stops, mechanical type oil pump O/P stops, when the converter speed ratio of speed-changing mechanism CVT is maintained regulation converter speed ratio, as converter speed ratio holdout device, by making electrodynamic type oil pump EO/P work to piston grease chamber supply oil pressure, maintain the converter speed ratio of speed-changing mechanism CVT.On the other hand, in example 4, when driving engine 1 stops, mechanical type oil pump O/P stops, when the converter speed ratio of speed-changing mechanism CVT is maintained regulation converter speed ratio, as converter speed ratio holdout device, primary pulley piezoelectricity magnetic coil 37-1 and secondary pulley piezoelectricity magnetic coil 37-2 is set to and closes completely, and the piston grease chamber of primary pulley 6 and secondary pulley 7 is sealed, maintain converter speed ratio.Thus, do not possess electrodynamic type oil pump EO/P, just can maintain converter speed ratio, can cost degradation be realized.
In addition, as described with reference to Figure 6, in secondary pulley, possess secondary spring SEC_SPR, this tension force can be guaranteed.Thus, also only primary pulley piezoelectricity magnetic coil 37-1 can be set to close completely by the mode (thick line with reference to Fig. 6) becoming below speed change resistance with Tension Difference between belt wheel, maintain converter speed ratio.
In addition, when primary pulley piezoelectricity magnetic coil 37-1 or secondary pulley piezoelectricity magnetic coil 37-2 can not be set to the pressure control valve of the mode of closing completely, also by adding the control cock that can close completely in addition, packed-piston oil pressure can be carried out.
(embodiment 5)
Then, embodiment 5 is described.Because basic structure is identical with embodiment 4, only difference is described.Figure 21 be represent embodiment 5 speed-changing mechanism and carry out oil pressure cntrol magnet coil outline figure.In example 4, when driving engine 1 stops, mechanical type oil pump O/P stops, when the converter speed ratio of speed-changing mechanism CVT is maintained regulation converter speed ratio, as converter speed ratio holdout device, primary pulley piezoelectricity magnetic coil 37-1 and secondary pulley piezoelectricity magnetic coil 37-2 is set to and closes completely, and the piston grease chamber of primary pulley 6 and secondary pulley 7 is sealed, maintain converter speed ratio.On the other hand, in embodiment 5, following this point is different: as converter speed ratio holdout device, the oil circuit on the oil circuit between primary pulley piezoelectricity magnetic coil 37-1 and primary pulley 6 and between secondary pulley piezoelectricity magnetic coil 37-2 and secondary pulley 7 is respectively equipped with control cock 51-1, the 52-1 that can close completely individually and energy storage 52-1,52-2.
In the traveling of HEV mode, control cock 51-1,52-1 are controlled, in energy storage 52-1,52-2, save oil pressure.Then, switch to EV pattern, when driving engine 1 stops, mechanical type oil pump O/P stops, when the converter speed ratio of speed-changing mechanism CVT is maintained regulation converter speed ratio, as converter speed ratio holdout device, primary piezo magnetic coil 37-1 and secondary piezoelectric magnetic coil 37-2 is set to and closes completely, and by the piston oil means of press seals of primary pulley 6 and secondary pulley 7, and control cock 51-1,51-2 are opened, will the piston grease chamber being supplied to primary pulley 6 and secondary pulley 7 in the oil pressure of energy storage 52-1,52-2 be saved.Thus, even if sealing not exclusively has leakage of oil, also can compensate spillage by energy storage 52-1,52-2, stably converter speed ratio can be maintained regulation converter speed ratio.
(embodiment 6)
Then, embodiment 6 is described.Because basic structure is identical with embodiment 1, only difference is described.Figure 22 be the speed-changing mechanism representing embodiment 6 outline figure.In embodiment 1, when mechanical type oil pump O/P stops driving engine 1 stops, when the converter speed ratio of speed-changing mechanism CVT is maintained regulation converter speed ratio, as converter speed ratio holdout device, electrodynamic type oil pump EO/P is worked and maintains the converter speed ratio of speed-changing mechanism CVT.On the other hand, in embodiment 6, as converter speed ratio holdout device, not only possess the secondary spring SEC_SPR producing thrust in secondary pulley 7, and possess the elementary spring PRI_SPR for also producing thrust in primary pulley 6.
That is, as utilized as described in Fig. 6, when the mode that the absolute value of Tension Difference becomes speed change below resistance Fr between with belt wheel produces primary pulley thrust, converter speed ratio energy ditch is maintained by speed change resistance Fr.Thus, the tension force fp of elementary spring PRI_SPR is set as larger than the tension force fs of secondary spring SEC_SPR, and sets the tension force of elementary spring PRI_SPR in the mode that the absolute value of Tension Difference (| fs-fp|) becomes speed change below resistance Fr.Thus, when mechanical type oil pump O/P stops driving engine 1 stops, not making the work such as control cock, just by spring force, the converter speed ratio of speed-changing mechanism CVT can be maintained regulation converter speed ratio.
(other embodiments)
Above, based on each embodiment, the present application is illustrated, but is not limited to said structure, even other structures, be also contained in the present application.
In an embodiment, in EV pattern, converter speed ratio is maintained regulation converter speed ratio, but also can adopts the discharge ability improving electrodynamic type oil pump, and in EV pattern, also change the structure of converter speed ratio according to motoring condition.In this case, speed-changing mechanism CVT also can not being made to carry out speed change rotatably, when needs make speed-changing mechanism CVT rotate, also can, by power-transfer clutch CL slippage being connected, speed-changing mechanism CVT being rotated.
In an embodiment, expression be carry out by self-starting motor 3 structure that driving engine restarts, but also can be other structures.Specifically, in recent years, a kind of vehicle with idle stop function, namely following technology is practical: alternating current generator is replaced with dynamotor, by this dynamotor except additional alternating current generator function, also additional engine start-up function, when the driving engine from idle stop is restarted, not by self-starting motor, but by this dynamotor, carry out driving engine and restart.The present application also can adopt carries out by dynamotor as above the structure that driving engine restarts.
In addition, in an embodiment, about the judgement in mode chart, the negative region of the longitudinal axis judges based on being switched on or switched off of brake switch 26, but be not limited to this, also can judge based on the output valve of the stroke sensor of brake pedal 16, or judge based on the output valve of the brake fluid pressure sensor detecting main hydraulic cylinder pressure etc.
In addition, in an embodiment, expression be the example being provided with secondary pulley piezoelectricity magnetic coil 37-2, but this secondary pulley piezoelectricity magnetic coil 37-2 also can not be set, but press PL to be directly supplied to secondary pulley 7 by by the pipeline after the pressure regulation of pipeline piezoelectricity magnetic coil 35.
In this case, in the step S5 of Fig. 7, when converter speed ratio being maintained regulation converter speed ratio, oil pressure is supplied along with in primary pulley 6, also in secondary pulley 7, oil pressure is supplied, but be usually set as the compression area of the compression area < primary pulley of secondary pulley, as long as so the discharge pressure of electrodynamic type oil pump EO/P is not extreme large, the relation of the tension force shown in Fig. 6 just sets up (magnitude relationship of tension force is constant), same with the situation only supplying oil pressure in primary pulley 6, converter speed ratio can be maintained regulation converter speed ratio.

Claims (10)

1. a motor vehicle driven by mixed power, has driving engine, toric transmission and drive motor, and be provided with driven by drive motor or regenerative brake drive wheel time the power-transfer clutch that can will discharge between drive wheel and toric transmission, it is characterized in that, be provided with:
Engine stop device, it, when by described power-transfer clutch release, makes described engine stop;
Converter speed ratio holdout device, it, when this engine stop device makes described engine stop, maintains the converter speed ratio of described toric transmission.
2. motor vehicle driven by mixed power as claimed in claim 1, is characterized in that,
To possess by described engine drive and to the mechanical type oil pump of described toric transmission supply oil pressure,
Described converter speed ratio holdout device, when described engine stop device makes described engine stop, by supplying oil pressure by the electrodynamic type oil pump of direct motor drive to described toric transmission, thus maintains the converter speed ratio of described toric transmission.
3. motor vehicle driven by mixed power as claimed in claim 2, is characterized in that,
Described toric transmission has: primary pulley, secondary pulley, the elastic body being wrapping with annular flexible parts between two belt wheels, producing the Clamping force of described secondary pulley,
Described converter speed ratio holdout device by supplying constant pressure to described primary pulley, thus maintains converter speed ratio.
4. motor vehicle driven by mixed power as claimed in claim 3, is characterized in that,
Described converter speed ratio holdout device supplies described constant pressure with the secondary tension force produced on described annular flexible parts by described elastic body with by the mode that the described constant absolute value being pressed in the difference of the elementary tension force that described annular flexible parts produce is less than the resistance tension force produced by the sliding resistance produced between described each belt wheel and described annular flexible parts.
5. the motor vehicle driven by mixed power according to any one of claim 2 ~ 4, is characterized in that,
When stopping under the state that stopped described driving engine, continue to maintain the described converter speed ratio be also maintained in parking.
6. the motor vehicle driven by mixed power according to any one of Claims 1 to 5, is characterized in that,
When any one in the rotating speed deficiency regulation rotating speed of the rotating speed deficiency regulation rotating speed of the not enough regulation pressure of discharge pressure of the pipeline pressure not enough regulation pressure of the oil hydraulic circuit being oil pressure source with described mechanical type oil pump, described mechanical type oil pump, described driving engine, described mechanical type oil pump is set up, described electrodynamic type oil pump is started working.
7. the motor vehicle driven by mixed power according to any one of Claims 1 to 5, is characterized in that,
When being driven by described drive motor from the mixing power fortune driving mode travelled by described driving engine to making described engine stop or the switching command of electric running pattern of regenerative brake drive wheel is output, make described electrodynamic type operation of oil pump.
8. the motor vehicle driven by mixed power according to any one of claim 1 ~ 7, is characterized in that,
Described control setup, when being output from described electric running pattern to the switching command of described mixing power fortune driving mode, stops the work of described electrodynamic type oil pump.
9. the motor vehicle driven by mixed power according to any one of claim 1 ~ 7, is characterized in that,
Described control setup, when the pipeline pressure of the oil hydraulic circuit being oil pressure source with described mechanical type oil pump is for specifying the discharge pressure of more than pressure, described mechanical type oil pump for specifying the rotating speed of more than pressure, described driving engine for specifying the rotating speed of more than rotating speed, described mechanical type oil pump for specifying that rotating speed is set up with upper any one, stops the work of described electrodynamic type oil pump.
10. the motor vehicle driven by mixed power according to any one of claim 1 ~ 9, is characterized in that,
There is the electrodynamic type operation of oil pump inhibiting apparatus of the work forbidding described electrodynamic type oil pump when defined terms is set up,
When forbidding the work of described electrodynamic type oil pump, even should select to be driven by described drive motor or the operative condition of electric running pattern of regenerative brake drive wheel, also select to forbid described electric running pattern and the mixing power fortune driving mode that travelled by described driving engine.
CN201480017069.3A 2013-03-21 2014-03-14 Motor vehicle driven by mixed power Active CN105050844B (en)

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